diff --git a/src/app/ui/tabs.cpp b/src/app/ui/tabs.cpp
index b00e52ebe..996156f6b 100644
--- a/src/app/ui/tabs.cpp
+++ b/src/app/ui/tabs.cpp
@@ -938,7 +938,10 @@ void Tabs::createFloatingOverlay(Tab* tab)
     for (int y=0; y<surface->height(); ++y)
       for (int x=0; x<surface->width(); ++x) {
         gfx::Color c = lock->getPixel(x, y);
-        c = (c != gfx::rgba(255, 0, 255) ? gfx::seta(c, 255): gfx::ColorNone);
+        c = (c != gfx::rgba(255, 0, 255, 0) &&
+             c != gfx::rgba(255, 0, 255, 255) ?
+             gfx::seta(c, 255):
+             gfx::ColorNone);
         lock->putPixel(c, x, y);
       }
   }